16 Beautiful but Deadly Frogs

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The harlequin poison frog has a fun-loving name, but these little guys produce a poison known as histrionicotoxins, which is different from the highly toxic batrachotoxins produced by other frogs like the golden poison dart frog.22 Though less toxic, it is still toxic enough that these frogs were desired for their use in making blowgun darts.23 It is also of interest to scientists, due to its unique properties and how it affects the body. Critically endangered, this interesting and special species is found in Columbia.24